1396999641 has 8 divisors (see below), whose sum is σ = 1863437184. Its totient is φ = 930947600.

The previous prime is 1396999627. The next prime is 1396999673. The reversal of 1396999641 is 1469996931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1396999641 - 2⁹ = 1396999129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1396999741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87810 + ... + 102491.

It is an arithmetic number, because the mean of its divisors is an integer number (232929648).

Almost surely, 2^1396999641 is an apocalyptic number.

It is an amenable number.

1396999641 is a deficient number, since it is larger than the sum of its proper divisors (466437543).

1396999641 is a wasteful number, since it uses less digits than its factorization.

1396999641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192751.

The product of its digits is 2834352, while the sum is 57.

The square root of 1396999641 is about 37376.4583795736. The cubic root of 1396999641 is about 1117.8892113531.

The spelling of 1396999641 in words is "one billion, three hundred ninety-six million, nine hundred ninety-nine thousand, six hundred forty-one".